如果下一行从来没有包含'blah'，你可以过滤他们:

grep -A1 blah logfile | grep -v blah

使用cat logfile |…不需要。

滚边是你的朋友……

使用grep -A1显示匹配后的下一行，然后将结果管道到tail，只抓取一行，

cat logs/info.log | grep "term" -A1 | tail -n 1

reaim的回答很好，对我很有用。将其扩展到打印模式之后的第7行是很简单的

awk -v lines=7 '/blah/ {for(i=lines;i;--i)getline; print $0 }' logfile

grep /Pattern/ | tail -n 2 | head -n

尾先2个，头最后一个，比赛结束后正好排在第一行。

you can use grep, then take lines in jumps: grep -A1 'blah' logfile | awk 'NR%3==2' you can also take n lines after match, for example: seq 100 | grep -A3 .2 | awk 'NR%5==4' 15 25 35 45 55 65 75 85 95 explanation - here we want to grep all lines that are *2 and take 3 lines after it, which is *5. seq 100 | grep -A3 .2 will give you: 12 13 14 15 -- 22 23 24 25 -- ... the number in the modulo (NR%5) is the added rows by grep (here it's 3 by the flag -A3), +2 extra lines because you have current matching line and also the -- line that the grep is adding.

我不知道有什么方法可以用grep来做到这一点，但是使用awk可以达到相同的结果:

awk '/blah/ {getline;print}' < logfile